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1、学 海 无 涯第二单元Smart CarsMichio Kaku。7 Two of the most frustrating things about driving a car are getting lost and getting stuck in traffic. While the computer revolution is unlikely to cure these problems, it will have a positive impact. Sensors in your car tuned to radio signals from orbiting satellit
2、es can locate your car precisely at any moment and warn of traffic jams. We already have twenty-four Navstar satellites orbiting the earth, making up what is called the Global Positioning System. They make it possible to determine your location on the earth to within about a hundred feet. At any giv
3、en time, there are several GPS satellites orbiting overhead at a distance of about 11,000 miles. Each satellite contains four atomic clocks, which vibrate at a precise frequency, according to the laws of the quantum theory.开车最头疼的两大麻烦是迷路和交通堵塞。虽然计算机革命不可能彻底解决这两个问题，但却会带来积极的影响。你汽车上与绕轨道运行的卫星发出的无线电信号调谐的传感器
4、能随时精确地确定你汽车的方位，并告知交通阻塞情况。我们已经有24颗环绕地球运行的导航卫星，组成了人们所说的全球卫星定位系统。通过这些卫星我们有可能以小于100英尺的误差确定你在地球上的方位。在任何一个特定时间，总有若干颗全球定位系统的卫星在11000英里的高空绕地球运行。每颗卫星都装有4个“原子钟”，它们根据量子理论法则，以精确的频率振动。8 As a satellite passes overhead, it sends out a radio signal that can be detected by a receiver in a cars computer. The cars com
5、puter can then calculate how far the satellite is by measuring how long it took for the signal to arrive. Since the speed of light is well known, any delay in receiving the satellites signal can be converted into a distance.卫星从高空经过时发出能被汽车上计算机里的接收器辨认的无线电信号。汽车上的计算机就会根据信号传来所花的时间计算出卫星有多远。由于光速为人熟知，接收卫星信号
6、时的任何时间迟缓都能折算出距离的远近。 第四单元 3. Although Browder and Mandl define their nationality differently, both see their identity as a matter of personal choice, not an accident of birth. And not incidentally, both are Davos Men, members of the international business lite whoeach year to thetown for the annual m
7、eeting of the, founded in 1971. This week, Browder and Mandl will join more than 2,200 executives, writers and Hollywood stars for five days of, parties and endlessdiscussions about everything from post-election Iraq andin Africa to the global supply of oil and the implications of. Yet this year, pe
8、rhaps more than ever, a hot topic at Davos is Davos itself. Whatever theirdifferences, most Davos Men and Women share at least one belief: that globalization, theflows of capital, labor and technology across national borders, is both welcome and unstoppable. They see the worldas one vast,in which co
9、rporations search for the mostlocations to buy, produce and sell their goods and services.虽然布劳德和曼德尔对各自的国籍界定不同，他们都将国籍视为个人选择，而不是由出生地决定的。而且，他俩都是达沃斯人，这可不是巧合。达沃斯人指的是那些每年长途跋涉去瑞士阿尔卑斯山区小城达沃斯参加年度世界经济论坛该论坛始于1971年的国际商业精英们。本周，布劳德和曼德尔将同其他2200余名企业高管、政界人士、学者、记者、作家和少数几位好莱坞明星一起，参加为时五天的交际活动、宴会和没完没了的认真的讨论。讨论话题林林总总，从大选
10、后的伊拉克和非洲的艾滋病病毒到全球的石油供应和纳米技术的重大意义。然而今年，或许比以往更甚的是，达沃斯论坛的一个热门话题就是达沃斯本身。尽管与会男女各不相同，但他们大多数有一个共同信念：全球化，亦即资本、劳动力和技术不受阻碍地跨国界流动，是值得欢迎和不可阻挡的。在他们看来，世界越来越像一个巨大的互相联系的市场。在这个市场里，企业寻求采购、生产及销售产品和服务的最佳地点。第六单元 24 As Godbey points out, the stress we feel arises not from a shortage of time, but from the surfeit of thing
11、s we try to cram into it. Its the kid in the candy store, he says. Theres just so many good things to do. The array of choices is stunning. Our free time is increasing, but not as fast as our sense of the necessary.正如戈德比所指出的，我们的紧张感并非源于时间短缺，而是因为我们试图在一个个时段中塞入过多的内容。“就像糖果店里的孩子，”他说，“有那么多美好的事情要做。选择之多，令人眼花
12、缭乱。我们的空余时间在增加，但其速度跟不上我们心中日益增多的必须做的事。”25 A more successful remedy may lie in understanding the problem rather than evading it.更有效的解决方式或许在于去理解这一问题，而不是回避这一问题。26 Before the industrial revolution, people lived in small communities with limited communications. Within the confines of their village, they co
13、uld reasonably expect to know everything that was to beknown, see everything that was to be seen, and do everything that was to be done.工业革命前，人们居住在交通联系不方便的小社区里。在本村范围内，人们自然而然地期望了解该了解的一切，见到该见的一切，做该做的一切。27 Today, being curious by nature, we are still trying to do the same. But the global village is a w
14、orld of limitless possibilities, and we can never achieve our aim.如今，生性好奇的我们仍试图这么做。然而，地球村是一个有着无限可能的世界，我们永远无法实现自己的目标。28 It is not more time we need: it is fewer desires. We need to switch off the cell-phone and leave the children to play by themselves. We need to buy less, read less and travel less. We need to set boundaries for ourselves, or be doomed to mounting despair.我们需要的不是更多的时间：是更少的欲望。我们定要关掉手机，让孩子们自己玩耍。我们定要少购物，少阅读，少出游。我们定要在有所为、有所不为方面给自己设定界限，不然则注定会越来越感到绝望。
